ya that looks like 12'6".. if the bottom rung was even with the rim, it would be 12' max. But, the bottom rung looks like it's ~6" above the rim, so 12'6". IIRC, the increments on the vertec bar go up by 6", so, 84", 90", 96", 102", 108", 114", 120", 126". I think 126" (10'6") would be a "custom line" on the bar; ie, it doesn't come default/officially marked on the vertec, but, you could create a marking with a marker on the bar, there's enough room. Not much room after 10'6" though.
pC!